I grew some very powerful Masterlowyryders.
they were crossed with master kush.probably some of the better bud i've smoked!
as for your question of it being a medical strain...I'm not really sure.but I grew it for med reasons and it helped me.(I have asthma and stomach problems.)
The masterkush lowryderbuds were extremely dank...so primo you would have no idea it came from a 13'' tall plant unless you grew it or knew who did!
I believe our friend is right when pointing out lowryders parentage,
They do use a secret ruderalis(from russia I believe)for it's auto-flowering qualities.